Patents by Inventor Claes T. Nilsson

Claes T. Nilsson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4929168
    Abstract: An object is produced from a tubular blank (10,15,17) of thermoplastic material of the type polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one single or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker and thinner materials along the blank and elongates simultaneously the blank in the moving direction of the transitional zone. After the last re-shaping operation the thinner material has preferably an oriented state. During the re-shaping operation the temperature of the material in the transitional zone (13,14,113) is controlled at a level which, immediately before the re-shaping operation, is within or close to the range of the glass transition temperature (TG).
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: May 29, 1990
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4758452
    Abstract: An article of a thermoplastic of polyester or polyamide type, preferably of polyethylene terephthalate, manufactured from an element consisting of an edge part which surrounds a body in an arrangement in which the latter is sunk relative to the edge part. The element is formed from a blank of mainly amorphous material or from a material having a crystallinity of less than 10%. The blank consists, for example, of a flat plate, a blank shell or the like. The body or parts thereof are shaped by stretching the blank until that material flows which is located within the material sections of the blank, which form the edge part in the element, the material stretched up to flowing in the body assuming a crystallinity of between 10% and 25%, while the crystallinity in the material in the edge part and in the unstretched parts retains its original value of less than 10%. At least the body of the element is expanded against warm mould walls until the final shape of the particular article is obtained.
    Type: Grant
    Filed: December 5, 1985
    Date of Patent: July 19, 1988
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4701121
    Abstract: Apparatus for producing a container from a tubular blank of polyethylene terephthalate or similar material, according to which a polyethylene terephthalate blank is stretched at least approximately 3-fold to produce a preform (20). In an axial section through the preform, the contour length substantially corresponds to the contour length in an axial section through the final container. The preform (20) is heated to a temperature above the glass transition temperature (TG) and is converted to the container (21) in a blow mold (12). In doing so, the contour length of the material is maintained through successive reduction of the axial length of the body (23) which the preform constitutes during the conversion to the container. In order to achieve this, the base portion of the blow mold (11) is moved towards the orifice (22) of the final container.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: October 20, 1987
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4631163
    Abstract: An object is produced from a tubular blank (10,15,17) of thermoplastic material of the type polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one single or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker and thinner material along the blank and elongates simultaneously the blank in the moving direction of the transitional zone. After the last re-shaping operation the thinner material has preferably an oriented state. During the re-shaping operation the temperature of the material in the transitional zone (13,14,113) is controlled at a level which, immediately before the re-shaping operation, is within or close to the range of the glass transition temperature (TG).
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: December 23, 1986
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4615925
    Abstract: A method for providing a container with one or more layers of barrier material during the production of the container from a thermoplastic. A preform (10) is stretched in its axial direction, generally an amount corresponding to the total axial stretching required for conversion of the preform to a container, after which the stretched preform (11, 13) is provided with one or more barrier layers (12, 14), and the preform is then heated and converted to a container. In one embodiment, the axially stretched preform (15) is produced by assembling axially stretched part-preforms (13a, b) covered with one or more barrier layers. The combined preform is then converted to a container. By means of the invention, it is possible to reduce the thickness of the barrier layers at the time of their application, which considerably simplifies the latter.
    Type: Grant
    Filed: April 25, 1983
    Date of Patent: October 7, 1986
    Assignee: PLM AB
    Inventor: Claes T. Nilsson
  • Patent number: 4584158
    Abstract: A method and a device for production of a temperature-stable, biaxially oriented container of thermoplastic material. In a first moulding stage a blank (40) is placed in a blow mould (12) after which a mandrel (15) extends the blank in its axial direction to a length exceeding the axial length of the future container. The length of the stretched material, in an axial section through the stretched blank, is then reduced at a predetermined temperature, and the reduction being made to a profile length substantially agreeing with the profile length for corresponding material portions in an axial section through the future container. In a second moulding stage the stretched blank is expanded to abut against the walls of the mould. The expansion takes place at a point in time for and/or at a speed allowing the reduction of the length of the stretched material, due to shrinkage to have time to be concluded before the material comes into contact with the walls of the mould.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: April 22, 1986
    Assignee: Petainer S.A.
    Inventors: Claes T. Nilsson, Kjell M. Jakobsen
  • Patent number: 4580968
    Abstract: An object is produced from a tubular blank (10,15,17) of thermoplastic material of polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker and thinner material along the blank and simultaneously elongates the blank in the moving direction of the transitional zone while reducing the thickness. After the last re-shaping operation the thinner material preferably has an oriented state. During the re-shaping operation the temperature of the material in the transitional zone (13,14,113) is controlled at a level which, immediately before the re-shaping operation, is within or close to the range of the glass transition temperature (TG).
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: April 8, 1986
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4569866
    Abstract: An object is produced from a tubular blank (10,15,17) of thermoplastic material of polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker and thinner material along the blank and simultaneously elongates the blank in the moving direction of the transitional zone while reducing the thickness. After the last re-shaping operation the thinner material preferably has an oriented state. During the re-shaping operation the temperature of the material in the transitional zone (13,14,113) is controlled at a level which, immediately before the re-shaping operation, is within or close to the range of the glass transition temperature (TG).
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: February 11, 1986
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4540544
    Abstract: A method for producing a container from a tubular blank of polyethylene terephthalate or similar material, according to which a polyethylene terephthalate blank is stretched at least approximately 3-fold to produce a preform (20). In an axial section through the preform, the contour length substantially corresponds to the contour length in an axial section through the final container. The preform (20) is heated to a temperature above the glass transition temperature (TG) and is converted to the container (21) in a blow mold (12). In doing so, the contour length of the material is maintained through successive reduction of the axial length of the body (23) which the preform constitutes during the conversion to the container. In order to achieve this, the base portion of the blow mold (11) is moved towards the orifice (22) of the final container.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: September 10, 1985
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4530811
    Abstract: A process of producing a tubular pre-moulding of a thermoplastic material, suitable for subsequent shaping to form containers by a rolling process. The material in a part of a tube is axially oriented as a result of reducing the wall thickness by applying an external pressure which causes the material to flow. The oriented material is moulded by a blow-moulding process into future mouth parts and parts of adjacent neck sections, preferably from two blank parts, joined to one another, of pre-mouldings, the blank parts in the transition between the two mouth parts being severed in order to form two separate blank parts, so that, after closing one end and, if necessary, reworking in order to obtain the requisite closing faces at the other end, the two blank parts each form a tubular pre-moulding.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: July 23, 1985
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4518340
    Abstract: Apparatus for producing a tubular premoulding of a thermoplastic material, suitable for subsequent shaping to form containers by a rolling process. The material in a part of a tube is axially oriented as a result of reducing the wall thickness by applying an external pressure which causes the material to flow. The oriented material is moulded by a blow-moulding process into future mouth parts and parts of adjacent neck sections, preferably from two blank parts, joined to one another, of pre-mouldings, the blank parts in the transition between the two mouth parts being severed in order to form two separate blank parts, so that, after closing one end and, if necessary, reworking in order to obtain the requisite closing faces at the other end, the two blank parts each form a tubular pre-moulding.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: May 21, 1985
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4493633
    Abstract: Apparatus for moulding an article (11) of thermoplastic material from a parison (10) in which certain parts (17,16) of the parison are re-formed while other parts (13,12,20) retain their shape. A difference in pressure is applied to the wall of the parison during the re-forming process. Material in the parison is also moved in the direction of those parts of the parison which are to be re-formed, whereby attenuation of the material may be avoided entirely, if so desired, also in those parts which are to be re-formed. The invention enables the parison for a bottle to be re-formed to an extent which is small by comparison with the thickness of the material, for example the so-called "neck support" ring and the so-called "pilfer proof" ring, starting with a tube of oriented material. In a device for the application of the invention the elements (22,21,25) are in contact with the parts (13,12,20) of the parison.
    Type: Grant
    Filed: January 14, 1983
    Date of Patent: January 15, 1985
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson, Lars G. Larsson
  • Patent number: 4467929
    Abstract: A container (21), and a method and apparatus for producing the container from a tubular blank of polyethylene terephthalate or similar material, according to which a polyethylene terephthalate blank is stretched at least about 3-fold to produce a preform (20). In an axial section through the preform, the contour length substantially corresponds to the contour length in an axial section through the final container. The preform (20) is heated to a temperature above the glass transition temperature (TG) and is converted to the container (21) in a blow mould (12). In doing so, the contour length of the material is maintained through successive reduction of the axial length of the body (23) which the preform constitutes during the conversion to the container. In order to achieve this, the base portion of the blow mould (11) is moved towards the orifice (22) of the final container.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: August 28, 1984
    Assignee: PLM A.B.
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4468187
    Abstract: A tubular article having a peripheral groove is formed by providing the groove in the wall of a tubular blank made of thermoplastic material such as polyethylene terephthalate by applying simultaneously a pressure against the wall of the blank and axial stretching forces. In the bottom of the groove the material is drawn to yielding and the blank is simultaneously elongated.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: August 28, 1984
    Assignee: PLM A.B.
    Inventors: Claes T. Nilsson, Kjell M. Jakobsen, Lars G. Larsen
  • Patent number: 4464106
    Abstract: Apparatus for producing a tubular pre-moulding of a thermoplastic material, suitable for subsequent blow-moulding to form a container comprising a mold in which a future mouth portion and a portion of adjacent neck section of a tube are moulded to form a pre-moulding, preferably from two mutually joined blank parts, by an axial stretch operation and a blow-moulding operation, the parts in the transition between the mouth portions being severed by a cutting device in order to form two separate blank parts. A tubular pre-moulding is produced after closing one end of the particular blank part and, if necessary, reworking in order to obtain the requisite closing face at the other end.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: August 7, 1984
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4462950
    Abstract: A tubular article having a peripheral groove is formed by providing the groove in the wall of a tubular blank made of thermoplastic material such as polyethylene terrephthlate groove by applying simultaneously a pressure against the wall of the blank and axial stretching forces. In the bottom of the groove the material is drawn to yielding and the blank is simultaneously elongated.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: July 31, 1984
    Assignee: PLM AB
    Inventors: Claes T. Nilsson, Kjell M. Jakobsen, Lars G. Larson
  • Patent number: 4416927
    Abstract: A tubular article (19) having a peripheral groove (12) is formed by providing the groove in the wall of a tubular blank (10) made of thermoplastic material such as polyethylene terephthalate by applying simultaneously a pressure against the wall of the blank and axial stretching forces. In the bottom of the groove (12) the material (15) is drawn to yielding and the blank is simultaneously elongated.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: November 22, 1983
    Assignee: PLM AB
    Inventors: Claes T. Nilsson, Kjell M. Jakobsen, Las G. Larson
  • Patent number: 4409176
    Abstract: An article (11) of thermoplastic material is moulded from a parison (10) in which certain parts (17,16) of the parison are re-formed while other parts (13,12,20) retain their shape. A difference in pressure is applied to the wall of the parison during the re-forming process. Material in the parison is also moved in the direction of those parts of the parison which are to be re-formed, whereby attenuation of the material may be avoided entirely, if so desired, also in those parts which are to be re-formed. The invention enables the parison for a bottle to be re-formed to an extent which is small by comparison with the thickness of the material, for example the so-called "neck support" ring and the so-called "pilfer proof" ring, starting with a tube of oriented material. In a device for the application of the invention the elements (22,21,25) are in contact with the parts (13,12,20) of the parison.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: October 11, 1983
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson, Lars G. Larsson
  • Patent number: 4405546
    Abstract: An object is produced from a tubular blank (10,15,17) of thermoplastic material of polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker and thinner material along the blank and simultaneously elongates the blank in the moving direction of the transitional zone while reducing the thickness. After the last re-shaping operation the thinner material preferably has an oriented state. During the re-shaping operation the temperature of the material in the transitional zone (13,14,113) is controlled at a level which, immediately before the re-shaping operation, is within or close to the range of the glass transition temperature (TG).
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: September 20, 1983
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4391861
    Abstract: A preform of thermoplastic material composed of a number of separate part-preforms fitted into one another in readiness for blow moulding to form a finished container. At least one of the part-preforms is stretched in the axial direction to provide crystallinity by monoaxial orientation. The part-preforms are singly or jointly provided with barrier layers. Different plastic materials can be used for the part-preforms as well as reprocessed plastic for one of the part-preforms. Through suitable selection of the material of the part-preforms as well as of the material of the barrier layers, it is possible to mould containers suitable for a great variety of different fields of application.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: July 5, 1983
    Assignee: PLM AB
    Inventor: Claes T. Nilsson